Roller-gage for saw-mills



(No Model.)

R. M. BECK.

ROLLER-.GAGE POR SAW MILLS. No.1260,929. Patented July 11, 1882.Y

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llllllllllll l-llll ATTORNEYS.

UNITED STATES PATENT OFFICE.

ROBERT M. BECK, OF WESTMINSTEB, MARYLAND.

ROLLER-GAGE FOR SAW-MILLS.

SPECIFICATION forming part of Letters Patent No. 260,929, dated July 11,1882.

Application filed Aprl11,1882. (No model.)

To all 'whom it may concern Be it known thatpI, ROBERT M. BECK, ofWestminster, in the county of Carroll and State of Maryland, haveinventd a new and useful Improvement in Roller-Gages for Saw- Mills, ofwhich the following is a full, clear, and exact description, referencebeing had to the annexed drawings, forming part of this specification.

This invention consists of certain improvements relating to means foradjusting a rollergage for saw-mills, as will be hereinafter fullydescribed.

In the accompanying drawings, Figure 1 is a side elevation ot' myimproved roller-gage. Fig. 2 is an end elevation ot' the same, and Fig.3 is a detail view.

The roller-gage A is supported in a bracket, B, which is adapted to bemoved along the bedpiece C to adjust the roller-gage toward or from theplane of the saw, according to the thickness of lumber desired.

For moving the sliding bracket a lever pivoted thereto and connected toa stationary bracket on the under side of the bed-piece by means of apivoted link has heretofore been used; but owing to the unadjustablecharacter ot' the connection formed by the pivoted link the slidingbracket cannot be shifted along the bed-piece when it is desired toadjust theroller-gage forthick lumber. Instead, therefore, of using thepivoted link, I employ abar, D, which is pivoted to the lever Eunderneath the bed-piece, and which projects through a slot in the endof the bed-piece opposite to the roller-gage. This bar is provided inits under surface with recesses F, by means of any one of which the baris made to engage with a retaining-support, G, consisting of across-bolt bent at right angles at each end and secured in perforationsin the bedpiece on opposite sides of the slot. The bolt is threaded ateach end, and is made accurately adjustable by means of nuts H I incontact with the inner and the outer surface ofthe bed-piece. Theretaining-support of the bar is thus madeto serve as acompensating-screw for taking up lost motion at the pivotal points ofthe bar andlever. The advantage ot this construction is that theadjustmen t ofthe rollergage can always be made to correspond exactlywith the graduated scale on the lever-retaining segment J, and thus thelumber will be of the exact thickness required.

It will he observed that the construction of the lever with a doubleelbow at its lower end and its combination with a segment of quadrantalshape extending from a vertical to a horizontal plane are calculated togive great scope to the action of the lever in adjusting theroller-gage, while the connection of the segment with the slidingbracket enables the segment to be moved with the bracket, so that itshall always sustain the same relative position with respect to thelever when the device is shifted along the bed-piece by the adjustmentof the bar D. The form of the segment is more or less determined by itsbeing rigidly connected to the sliding bracket, and for a quadrantalsegment arranged as described the elbow lever is practically a matter ofnecessity, since a straight lever could not be used to any greatadvantage in such a connection.

Having thus described my invention, what 1 claim, and desire to secureby Letters Patent, 1s-

l. The combination, with the lever E and its retaining-segment, thebracket B, carrying the roller-gage, and the bed-piece C, of the bar D,pivoted to the lever and having a series of recesses, F, for forming anadjustable connection with the bed-piece, substantially as shown anddescribed.

2. The combination, with the lever E and its retaining-segment, thebracket B, carrying the roller-gage, and the bed-piece C, of the bar D,having recesses, as described, and the retaining-support G, secured tothe bed-piece and adapted to serve as a compensating device,substantially as and for the purpose specified.

3. The combination, with the lever E, having a double elbow at its lowerend and piv Oted to the sliding bracket, of the quadrantal segment J,secured to the sliding bracket and extending from a horizontal to avertical plane, substantially as shown and described, whereby therelative position of the lever and its retaining-segment shall remainunchanged when the bar D is moved from one adjustment to another, asspecified.

ROBT. M. BECK.

Witnesses A. G. LYNE, SoLoN C. KEMON.

IDO

